8 887 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
782472142663	12	39.5	old
3440776821743	13	41.6	old
1306760950645628240479180956421521960143	40	129.9	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	10831 / 16550

Estimated T-Level: 48.3 ⓘ

TF below 2^155 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	8CFB23E2A74A494D	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	8CFB23E2A74A494D	3	0	1	3
Verified	2017-12-07	ATH	8CFB23E2A74A494D	3	5145	1	3
Unverified	2020-04-17	Oliver Kruse	98A4E70B990DAA__	3	517	5	3

P-1 factors

Date	Factor	B1	B2
2023-08-09	2692312012134432416321609	100000000	100000000

History

Date	User	Type	Result
2023-08-09	BoYuan Chen	F-PM1	Factors: 3440776821743,782472142663 / (P-1, B1=100000000)
2023-08-03	JacobZ	NF-PM1	B1=66000000000, B2=254680416808818000
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 98A4E70B990DAA__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 8CFB23E2A74A494D PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 8CFB23E2A74A494D PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8887/known_factors : 8CFB23E2A74A494D PRP without proof (not generated)